77612401 has 4 divisors (see below), whose sum is σ = 77756404. Its totient is φ = 77468400.

The previous prime is 77612399. The next prime is 77612411. The reversal of 77612401 is 10421677.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10421677 = 7 ⋅1488811.

It can be written as a sum of positive squares in 2 ways, for example, as 48441600 + 29170801 = 6960^2 + 5401^2 .

It is a cyclic number.

It is not a de Polignac number, because 77612401 - 2¹ = 77612399 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77612401.

It is not an unprimeable number, because it can be changed into a prime (77612411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71190 + ... + 72271.

It is an arithmetic number, because the mean of its divisors is an integer number (19439101).

Almost surely, 2^77612401 is an apocalyptic number.

It is an amenable number.

77612401 is a deficient number, since it is larger than the sum of its proper divisors (144003).

77612401 is a wasteful number, since it uses less digits than its factorization.

77612401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144002.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 77612401 is about 8809.7900656032. The cubic root of 77612401 is about 426.5569669013.

The spelling of 77612401 in words is "seventy-seven million, six hundred twelve thousand, four hundred one".